WO2000074637A1 - Implants dentaires et procedes de revetement de ces derniers - Google Patents

Implants dentaires et procedes de revetement de ces derniers Download PDF

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Publication number
WO2000074637A1
WO2000074637A1 PCT/FI2000/000488 FI0000488W WO0074637A1 WO 2000074637 A1 WO2000074637 A1 WO 2000074637A1 FI 0000488 W FI0000488 W FI 0000488W WO 0074637 A1 WO0074637 A1 WO 0074637A1
Authority
WO
WIPO (PCT)
Prior art keywords
dental
dlc
metal
implant
alloy
Prior art date
Application number
PCT/FI2000/000488
Other languages
English (en)
Inventor
Kari Luotio
Original Assignee
Osfix International Ltd Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osfix International Ltd Oy filed Critical Osfix International Ltd Oy
Priority to AU47621/00A priority Critical patent/AU4762100A/en
Publication of WO2000074637A1 publication Critical patent/WO2000074637A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/30—Inorganic materials
    • A61L27/303—Carbon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
    • A61C8/0013—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy with a surface layer, coating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/20—Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/40—Primers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys

Definitions

  • the present invention relates to dental implants, implant supported structures and other dental laboratory metallic works and to a method for the coating of the same.
  • the aim of the present invention is thus to achieve a dental implant, implant supported structure or other dental laboratory metallic works or framework in which the solubility of cobalt chrome components is decreased thus avoiding allergic reactions and also other adverse reactions caused by the material used for dental implants and framework inside the bone tissue or soft tissue or outside the same. Further aim of the invention is to achieve an adequate method for coating dental implant frameworks.
  • the implant or framework and the method according to the present invention basically uses thin film technology for achieving the desired advantageous result.
  • the present invention is based on a thin film which has been made from DLC (Diamond Like Carbon) film.
  • DLC Diamond Like Carbon
  • the base material is first covered by a very thin film of titanium or other suitable material to avoid difficulties in layering the DLC over the base material.
  • the method of making the said thin layer of DLC on the base material is, for instance, a pulsed carbon plasma arc PVD method.
  • the deposition procedure is carried out in a vacuum in room temperature.
  • the present invention is by no means restricted to the used method as it is evident to a person skilled in the art that also other methods are applicable when DLC is layered over the base structure. For instance; low pressure chemical vapour deposition (CVD), various plasma evaporation techniques, various ionization processes or chemical gaseous phase deposition are techniques that can be used.
  • the base material was cast CoCrMo alloy (Wironit extra hard, Bego, Germany), with nominal composition of Co 63; Cr 30; Mo 5; Si 1.1 ; Mn 0.5; C 0.4.
  • the test plates were custom made and hand polished using standard methods of dental laboratories. The size of the test plates was 4 cm 2 and thickness 0.5 mm.
  • the microstructural studies of the films were carried out with a Philips XL30 scanning electron microscope (SEM).
  • SEM scanning electron microscope
  • the corrosion tests were all made using a 0.9 % physiological saline solution (Medipolar) as a corrosion medium.
  • the pH-value was set to 4.7 with HCI.
  • the duration of the immersion test was 2 months and the weight loss was measured with the accuracy of 0.1 mg.
  • the electrochemical polarization measurements were done with EG & G Pare computer controlled potentiostat/galvanostat Model 273A. Reference electrode was Ag/AgCI and counter electrode platinum. A potentiodynamic measuring technique was used and the potential was changed at a speed of 0.5 mV/min. Dissolution tests were done by polarizing the samples electrochemically near corrosion potential.
  • the immersion time before the first measurement was 24 hours after which the electrolyte was changed to a new one. After that the immersion time was 48 hours; so the total testing time was 72 hours.
  • the amount of ions dissolved were determined from the solution by ICP analysis.
  • film thickness during deposition reaches the value of 400...500 nm, the morphology of the film changes, and this can be seen in the SEM-micrograph, seen in Figure 1.
  • the total thickness of the film is approximately 1 ⁇ m.
  • Some porosity can be seen on the surface of the film as well as some macro particles. These are formed in the upper half of the film, when the amount of the DLC is more than 50 % and they are macro- droplets from the process.
  • the pores are mainly situated near the agglomerates and so they are also present only within the upper half of the film.
  • the average pore size is approx. 200 nm.
  • the potential was scanned from -600 mV to 1200 mV.
  • the corrosion current density was about 0.02 ⁇ A/cm 2 for DLC-films and base material. All tested examples had some open porosity, which affected both the corrosion current density and the corrosion potential.
  • the corrosion potential was -380 mV vs. Ag/AgCI for CoCr-plate and around -200 mV for the coated plates. No clear passivation effect was detected in this saline solution. Based on these results, the chloride content in physiological saline solution is high enough clearly to disturb the formation of the protective passive layer on CoCr-alloy.
  • the dissolved metal ions in the corrosive media were measured. Diluted into the liquid, cobalt was found to dissolve at much higher rate (nearly 3 times more) than chromium from the base material. No other ions from the cast alloy were detected. With DLC-film the amount of Co was reduced to 30 % of the uncoated alloy.
  • the examined materials have been accepted as highly biocompatible materials in medical literature. From a clinical point of view the surface hardness of the exposed metallic framework is important because calculus removing is a procedure which is highly wearing and damage causing. Thus the DLC is a very interesting material. Moreover, it is in common use in heart valve prosthesis and under studies for hip prosthesis. The biocompatibility of DLC is well documented using both cell culture and animal tests.
  • the studied films contained small amount of porosity due to coating process.
  • the surface scratches were found to be the preferred sites for pore formation.
  • the DLC film contained some small agglomerates within the upper half of the film.
  • the coatings were able to reduce the amount of dissolved ions from base material. The reduction of dissolved Co-ions was remarkable.
  • DLC film is a promising coating to prevent CoCr ion release and the hardness of the surface of DLC is also excellent for the purposes of this use.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dentistry (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Ceramic Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Transplantation (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Cette invention concerne un procédé de revêtement d'un implant dentaire, d'une structure supportée par un implant ou d'une pièce ou appareil métallique et de laboratoire dentaire se composant d'un alliage coulé de CoCr ou d'un autre métal ou alliage de métaux. Cette invention concerne également un implant dentaire, une structure supportée par un implant ou une pièce ou appareil métallique et de laboratoire dentaire. Le revêtement consiste en un film DLC fabriqué, par exemple, selon un procédé de DCPV. Ce revêtement empêche le Co et le Cr ou autres ions de se dissoudre sous l'effet des conditions buccales.
PCT/FI2000/000488 1999-06-02 2000-05-31 Implants dentaires et procedes de revetement de ces derniers WO2000074637A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU47621/00A AU4762100A (en) 1999-06-02 2000-05-31 Dental implants and method for their coating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI991264 1999-06-02
FI991264A FI991264A0 (fi) 1999-06-02 1999-06-02 Hammasistutteet ja niiden valmistusmenetelmä

Publications (1)

Publication Number Publication Date
WO2000074637A1 true WO2000074637A1 (fr) 2000-12-14

Family

ID=8554795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2000/000488 WO2000074637A1 (fr) 1999-06-02 2000-05-31 Implants dentaires et procedes de revetement de ces derniers

Country Status (3)

Country Link
AU (1) AU4762100A (fr)
FI (1) FI991264A0 (fr)
WO (1) WO2000074637A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2186494A1 (es) * 2000-10-31 2003-05-01 Fundacion Inasmet Materiales medicos recubiertos con un recubrimiento de carbono con estructura de diamante.
FR3010302A1 (fr) * 2013-09-06 2015-03-13 Robert Fromental Procede de fabrication d'un implant dentaire comportant une couche de materiau amorphe et implant dentaire obtenu selon ledit procede
WO2016089700A1 (fr) * 2014-12-03 2016-06-09 Coulombic, Inc. Électrodes et dispositifs électrochimiques, et procédés de fabrication d'électrodes et de dispositifs électrochimiques

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3865585A (en) * 1972-05-26 1975-02-11 Witten Edelstahl Cobalt chromium based alloy
US5203804A (en) * 1991-07-18 1993-04-20 Minnesota Mining And Manufacturing Company Coated dental article
US5232361A (en) * 1992-04-06 1993-08-03 Sachdeva Rohit C L Orthodontic bracket
US5688557A (en) * 1995-06-07 1997-11-18 Lemelson; Jerome H. Method of depositing synthetic diamond coatings with intermediates bonding layers
WO2000007516A2 (fr) * 1998-08-03 2000-02-17 Anson Medical Ltd. Dispositifs orthodontiques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3865585A (en) * 1972-05-26 1975-02-11 Witten Edelstahl Cobalt chromium based alloy
US5203804A (en) * 1991-07-18 1993-04-20 Minnesota Mining And Manufacturing Company Coated dental article
US5232361A (en) * 1992-04-06 1993-08-03 Sachdeva Rohit C L Orthodontic bracket
US5688557A (en) * 1995-06-07 1997-11-18 Lemelson; Jerome H. Method of depositing synthetic diamond coatings with intermediates bonding layers
WO2000007516A2 (fr) * 1998-08-03 2000-02-17 Anson Medical Ltd. Dispositifs orthodontiques

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2186494A1 (es) * 2000-10-31 2003-05-01 Fundacion Inasmet Materiales medicos recubiertos con un recubrimiento de carbono con estructura de diamante.
FR3010302A1 (fr) * 2013-09-06 2015-03-13 Robert Fromental Procede de fabrication d'un implant dentaire comportant une couche de materiau amorphe et implant dentaire obtenu selon ledit procede
WO2016089700A1 (fr) * 2014-12-03 2016-06-09 Coulombic, Inc. Électrodes et dispositifs électrochimiques, et procédés de fabrication d'électrodes et de dispositifs électrochimiques
CN107210452A (zh) * 2014-12-03 2017-09-26 库仑比克公司 电极和电化学器件以及制造电极和电化学器件的方法
US9831503B2 (en) 2014-12-03 2017-11-28 Coulombic, Inc. Electrodes and electrochemical devices and methods of making electrodes and electrochemical devices

Also Published As

Publication number Publication date
AU4762100A (en) 2000-12-28
FI991264A0 (fi) 1999-06-02

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